Alcatel-Lucent 7750 SR OS - Manual (Page 237)

VRRP
7750 SR OS Router Configuration Guide Page 237
ping-reply
Syntax [no] ping-reply
Context config>router>if>vrrp
Description This command enables the non-owner master to reply to ICMP echo requests directed at the vritual
router instances IP addresses.
Non-owner virtual router instances are limited by the VRRP specifications to responding to ARP
requests destined to the virtual router IP addresses and routing IP packets not addressed to the virtual
router IP addresses. Many network administrators find this limitation frustrating when
troubleshooting VRRP connectivity issues.
7750 SR OS allows this access limitation to be selectively lifted for certain applications. Ping, Telnet
and SSH can be individually enabled or disabled on a per-virtual-router-instance basis.
The ping-reply command enables the non-owner master to reply to ICMP echo requests directed at
the virtual router instances IP addresses. The Ping request can be received on any routed interface.
Ping must not have been disabled at the management security level (either on the parental IP interface
or based on the Ping source host address).
When ping-reply is not enabled, ICMP echo requests to non-owner master virtual IP addresses are
silently discarded.
Non-owner backup virtual routers never respond to ICMP echo requests regardless of the ping-reply
setting.
The ping-reply command is only available in non-owner vrrp nodal context.
By default, ICMP echo requests to the virtual router instance IP addresses are silently discarded.
The no form of the command configures discarding all ICMP echo request messages destined to the
non-owner virtual router instance IP addresses.
Default no ping-reply - ICMP echo requests to the virtual router instance IP addresses are discarded.
shutdown
Syntax [no] shutdown
Context config>router>if>vrrp
Description This command administratively disables an entity. When disabled, an entity does not change, reset, or
remove any configuration settings or statistics.
The operational state of the entity is disabled as well as the operational state of any entities contained
within. Many objects must be shut down before they may be deleted.
The no form of this command administratively enables an entity.
Special Cases Non-Owner Virtual Router — Non-owner virtual router instances can be administratively
shutdown. This allows the termination of VRRP participation in the virtual router and stops all
routing and other access capabilities with regards to the virtual router IP addresses. Shutting down the
virtual router instance provides a mechanism to maintain the virtual routers without causing false
backup/master state changes.